Question

我有一个关于L系统的项目。我试图添加一个打印L系统的乌龟;但是，与文本字段不同，canvas不会展开。当我打印更多文本时，我的文本字段正在通过滚动条扩展。然而，乌龟被卡在画布上。我真的被卡住了。

frame2 = tki.Frame(frame, bg='yellow', width=810, height=510)
frame2.pack()
frame2.place(x=500,y=5)
cv = Canvas(frame2, width=2000, height=2000)
cv.place(x=0, y=0)

screen = turtle.TurtleScreen(cv)
t = turtle.RawTurtle(screen)

hbar=Scrollbar(frame2,orient=HORIZONTAL)
hbar.pack(side=BOTTOM,fill=X)
hbar.config(command=cv.xview)
vbar=Scrollbar(frame2,orient=VERTICAL)
vbar.pack(side=RIGHT,fill=Y)
vbar.config(command=cv.yview)
cv.config(width=800,height=500)
cv.config(xscrollcommand=hbar.set, yscrollcommand=vbar.set)
cv.pack(side=LEFT,expand=True,fill=BOTH)

Answer 1

If I understand your question correctly, why doesn't the ScrolledCavas that the turtle library provides for this purpose work for you:

EDIT: I've started the canvas size at the frame size and added the reset() method of ScrolledCanvas to expand the canvas dynamically:

import tkinter as tk
from turtle import TurtleScreen, RawTurtle, ScrolledCanvas

size = 100
canvsize = 300

root = tk.Tk()
root.geometry('600x500')

frame = tk.Frame(root, width=300, height=300)
frame.pack()
frame.place(x=50, y=50)

canvas = ScrolledCanvas(frame, canvwidth=canvsize, canvheight=canvsize)
canvas.pack(side=tk.LEFT)

screen = TurtleScreen(canvas)
screen.bgcolor('yellow')

turtle = RawTurtle(screen, visible=False)
turtle.dot(size, "green")

def expand():
    global canvsize, size

    if size < 800:
        size += 10
        if size > canvsize:
            canvsize += 100
            canvas.reset(canvwidth=canvsize, canvheight=canvsize)

        turtle.dot(size, "green")
        screen.ontimer(expand, 100)

screen.ontimer(expand, 100)

screen.mainloop()

Python Canvas不会自动扩展为龟打印

1 个答案: